.App{
  width: 100vw;
  height: 100vh;
}
.my-node-enter {
  opacity: 0;
}
.my-node-enter-active {
  opacity: 1;
  transition: all 5000ms;
}
.my-node-exit {
  opacity: 1;
}
.my-node-exit-active {
  opacity: 0;
  transition: opacity 1000ms;
}
.f-center{
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
}
